Call javascript function with parameters and read the return values in page load

Question

I have javascript function in default.aspx like this:

 function ReadValue(Name) {
    Return value;
 }

Now from pageLoad method, I want to pass parameter and get the return value to server side variable.

Answer 1

To send data from the client to the server, you have to ... send data from the client to the server. :-) Typically, you do that with Ajax , although there are other ways as well (doing a standard form POST , or even doing a GET of some kind although if your server is going to act on the information by changing server state, you shouldn't use GET ).

Answer 2

another way is by putting the values in sever side controls for exmaple in jquery you can do something like this:

function pageLoad(sender, args) {
$("#txtMyTextBoxID").val('my value')

}

aspx:

<asp:TextBox ID="txtMyTextBoxID" runat="server" ClientIDMode="Static"></asp:TextBox>

Answer 3

I would say the best idea is to make a Javascript function and make a server side Hiddenfield. Access that hidden field and store your values (comma delimited) in your hiddenfield. and access it on page load.

I do it this way.

<asp:HiddenField ID="hdn" runat="server" />
document.getElementById("<%= hdn.ClientID%>").value = "your value";